Factoring Binomials - Difference of Squares


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Objective: I can factor binomials that are difference of squares.

A difference of squares is a binomial of the form:

a2b2

Take note that the first term and the last term are both perfect squares.

When we factor a difference of two squares, we will get

a2b2 = (a + b)(a – b)

This is because (a + b)(a – b) = a2ab + ab – b2 = a2b2

Read the lesson on Difference of Squares if you need more information.


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Factor the following.
Enter each answer in the format (x+1)(x-1), with no spaces.

x2 – 25 =

x2 – 9 =

x2 – 81 =

x2 – 100 =

x2 – 49 =

9x2 – 16 =

4x2 – 9 =

x2 – 36 =

49x2 – 64 =

x2 – 1 =

25x2 – 1 =

x2 – 121 =

25x2 – 9 =

64x2 – 9 =

x2 – 4=


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